Oil-pump.



H. D. JOHNSON,

OIL PUMP.

APPLICATWN. HLED JUNE 1a, 1925.

Patented Sept. 12, 1916.

2 SHEETS-SHEET I.

Sauna U601, H

H M 14 Maw PATNT @Fhlltlfi HARRY D. JOHNSON, 0F COIVIANCHE, OKLAHOMA.

OIL-PUMP.

i ea nee.

Z '0 all whom it may concern:

Be it known that l, HARRY D. Joi-ruson, a citizen of the United States,residing at Comanche, in the county of Stephens and State of Oklahoma,have invented new and useful improvements in Oil-Pumps, of

provide a pump of this character which is simple of construction,reliable and eilicient in action, and which embodies a simple type ofvalved inlets and outlets and a novel construction of gearing and clutchmechanism, whereby the pump piston may be operated in oppositedirections while the crank is turned continuously in one direction.

The invention consists of the features of construction, combination andarrangement of parts herein fully described. and claimed, referencebeing had to the accompanying drawings in which Figure l is anelevational view of the device as employed in connection with a storagereceptacle, the receptacle appearing in section. Fi 2 is a verticalsection through the pump cylinder and inlet and outlet pipes on anenlarged scale. Fig. 3 is a vertical section on the line 4+4 of Fig. 1.Fig. 4'. is a sectional plan view, showing the gearing. Fig. 5 is ahorizontal transverse sec tion on line 6(l of Fig. 4, showing in full.and dotted lines the clutch pins in their two Working positions.

In carrying my invention into practice, I provide a pump cylinder lot adetermined measuring capacity, say one gallon, the top and bottom headsof which cylinder are provided with stufiing boxes 2 for the passage ofthe upper and lower ends of the pump piston rod 3 carrying thereciprocating piston l. The cylinder and cooperating parts of the pumpare preferably arranged in practice within the storage tank orreceptacle 5 containing the oil to be dispensed.

Communicating with the top and bottom Specification of Letters Patent.

Application filed June 18, 1915.

Patented flopt. i2, M316.

Serial no. 34,894.

portions of the pump cylinder are intake pipes 6 and 7 provided withcheck valves (3 and 7, each of which opens in a direction toward the endof the cylinder with which it communicates and closes in the oppositedirection gainst the return of the oil. Communicating with the upper andlower portions of the cylinder are also outlet pipes 8 and 9 havingcheck valves 8' and 9 therein, each opening in a direction away from theend of the cylinder with which it communicates and closing in theopposite direction against the return of any dis charged oil to thecylinder. The pipe 9 is shown in the form of a bypass which Com-f.inunicates with the pipe 8 beyond the valve 8, and the pipe 8 is shownas having a continuation or prolongation whiclrprojects upwardly throughthe tank or reservoir and is provided with a discharge spout or noz- 21010.

The piston is adapted to be reciprocated for a continuous pumping actionby means of gearing operated by a primary rotary power device andembodying means whereby the piston may be oppositely reciprocatedwithout the necessity of reversing the direction of motion of said powerdevice. The gearing shown for the purpose described comprises a pair ofrack bars 11 and 12 arranged in parallel relation and which are integralwith or suitably fixed to the up per end of the piston rod. The rackedtoothed surfaces of these bars are arranged in different verticalplanes, and said tooth surfaces respectively mesh with gears 11 and 12mounted upon asupportingshaft13.

'lhe shatt 13 1s hollow and is provided with fixed flange or collar 14Lspacing the 95 gears from each other, the gears being loosely mountedupon the said shaft 13 through which extends a concentric drive shaft15, which is mounted to' turn within the shaft 13, which latter isjournaled in bearings 16' upon suitable supporting standards 17.

The hubs of the gears 11 and 12 have clutch collars 11 and 12",respectively, which project beyond their relatively outer faces and areslotted or recessed to receive transverse clutch pins Ill and 12",respectively, which are fixed to the driving shaft 15 and are free tomove to a certain extent in slits 18 in the driven. shaft 13 throughwhich the ends of the pins project. These pins connect two shafts l3 and15 for rotation with each other and permit the shaft 15 to have alimited degree of sliding motion in the shaft 13, the arrangement of thepins being such that when the shaft 15 is at the limit of its slidingmotion in one direction the pin 11 will be out of engagement with thecoacting clutch member 11*,

while the pin 12 will be in engagement with the clutch member 12, andvice versa when the shaft 15 is disposed at the limit of its oppositeendwise movement. Hence it will be understood that by sliding the shaft15 in one direction or the other either gear wheel may be clutched toth"shafts for rotation therewith, while the other gear wheel may bedisconnected therefrom, the arrangement of the gears and racks beingsuch that by alternately throwing the gears into and out of action thepiston may be reciprocated in opposite directions within the cylinderwithout changing the direction of rotation of the driving shaft 15.

Fixed to one end of the shaft 13 is a laterally extending crank arm 19,and pivoted to the adjacent end of theshaft 15, as at 20, is a drivingcrank 21 provided with a handle 22, which driving crank is pivotallyconnected with the arm 19 as indicated at 23. By this construction itwill be evident that the two shafts are connected for movement in unisonother than through the clutch pins and that the crank 21 when rotatedwill turn both shafts in unison, while. communicating motion only tothat gear which is at the time clutched to the shaft 13. The crankhandle 21 is also pivotally movable as a lever on the connection 23 sothat, through the connection 20, it may be adjusted to transmit back andforth sliding motion to the shaft 15 to alternately throw the gears intoand out of clutched engagement with the driven shaft 13, as will bereadily understood.

The mode of'operation of the pump will be obvious from the foregoingdescription, assuming that one of the gears is in clutched engagementwith the driven shaft and the piston is at one end of the cylinder, therotation of the driving crank will move the piston toward the oppositeend of the cylinder, thus expelling through the discharge outlet thecharge of oil previously drawn into the cylinder. By now shifting thedriving shaft the gear which has been in action may be thrown out ofaction and the other gear connected with the driven shaft, so that onthe continued motion of the crank in the same direction as before thepiston will be moved on its opposite or return stroke, expelling the oilpreviously drawn in at the opposite end of the cylinder on the expellingstroke just described. Hence a major amount of oil may be discharged oneach working stroke of the piston, making the pump continuous in action,Without loss of time or inconvenience in throwing;the gears into and outof action, and without the necessity of reversing the direction ofmotion of the driving crank, the advantages of which will be apparent.

I claim 1. A pump comprising with the opposite ends of the cylinder, areciprocating piston working in the cylinder, rack bars connected withthe piston, a driven shaft, gears loosely mounted on said shaft, a driveshaft extending throu h thedriven shaft, means for operating t c driveshaft, clutches 'for connecting the gears with and disconnecting themfrom said shafts, and means for adjusting the drive shaft in oppositedirections for alternately throwing said clutch devices into and out ofaction.

2. A pump comprising a cylinder, check valved inlets and outletscommunicati g with the opposite ends of 'the 'cylinder,,' areciprocating piston workin der, rack bars connected with the piston, adriven shaft, gears loosely mounted on said shaft, a drive shaftextending through the driven shaft, means for operating the drivingshaft, and means controlled by adjustments of the driving shaft foralter,- nately connecting the gears with and disconnecting them from theshafts.

3. A pump comprising a cylinder, check valved inlets and outletscommunicating with the opposite ends of the cylinder, a reciprocatingpiston'working in the cylinder, rack bars connected with the piston, adriven shaft, gears loosely mounted on said shaft, a drive shaftextending through the driven shaft, means for driving said shaft, andclutch devices operative by reverse slidi'ng motions of the drivingshaft and for altcrnately connecting said gears with and disconnectingthem from the shafts, whereby the piston may be reci rocated withoutreversing the direction 0 motion of the driving shaft. j

4. A pump comprising a pump cylinder, check valved inlets and outletscommunicating with the opposite ends of said cylinder, a reciprocatingpiston working in the cylinder, rack bars connected with the piston,gears meshing with the rack bars, said gears having slotted clutchmembers, a driven shaft on which said gears are loosely mounted, saidshaft having slots, a drive shaft mounted to slide within the drivenshaft, clutch pins carried by said drive shaft and projecting throughsaid slots in the driven shaft, and means for operating the drive shaftand sliding said shaft to throw' the sets ofaglutch members alternatelyinto and mwa'ftcuon "at the ends of opposite strokes of the piston.

5. A pump comprising a pump cylinder,

I acylinder, check valved inlets and outlets communicating in the cylin-i check valved inlets and outlets communicating with said cylinder, areciprocating piston arranged to operate Within the cylinder, rack barscarried by said piston, c0ncentric shafts, gears loosely mounted on theouter shaft, and meshing with the rack bars, adriving crank pivotallyconnected with said shafts, whereby the shafts may be retated in unison,and clutch devices operative by the sliding movements of the inner shaftIn for alternately connecting the gears with and disconnecting them fromsaid shafts.

In testimony whereof I afiix my signature in presence of two witnesses.

HARRY D. JOHNSON. Witnesses:

P. H. P120111, J. H. OTT.

